Given the proliferation of bouncing models in recent years, we gather and critically assess
these proposals in a comprehensive review. The PLANCK data shows an unmistakably red …

We review the status of bouncing cosmologies as alternatives to cosmological inflation for
providing a description of the very early universe, and a source for the cosmological …

The goal of this contribution is to present the properties of a class of quantum bouncing
models in which the quantum bounce originates from the Dirac canonical quantization of a …

Quoique le paradigme inflationaire soit maintenant communément accepté comme
représentant la meilleure explication des données cosmologiques, il n'est pas pour autant …

This chapter focuses on canonical quantum gravity and discusses how many conceptual
problems, such as the measurement problem and the problem of time, can be overcome by …

We investigate cosmological scenarios containing one canonical scalar field with an
exponential potential in the context of bouncing models, in which the bounce happens due …

Matter bounces refer to scenarios wherein the universe contracts at early times as in a
matter dominated epoch until the scale factor reaches a minimum, after which it starts …

An old question surrounding bouncing models concerns their stability under vector
perturbations. Considering perfect fluids or scalar fields, vector perturbations evolve …

We investigate the spectrum of cosmological perturbations in a bounce cosmos modeled by
a scalar field coupled to the string tachyon field (CSTB cosmos). By explicit computation of …

Quantum effects play an essential role in modern cosmology. Perhaps the most striking
example comes from large-scale structures, generally assumed to originate from vacuum …